VB.NET"Newtonsoft.Json.JsonReaderException"

HI! 我遇到了一个问题,找了很久也找不到解决方法,希望大家能给我好的建议,谢谢.报错部分如下

 Public Sub HttpPostErrorWithExceptionEx(Of T)(urlstr As String, param As Object, ByRef outParam As T)
//......省略部分代码
Try
            outParam = JsonConvert.DeserializeObject(Of T)(res.ResultStr)
        Catch ex As Exception
            Throw New CodeException(GSTR_ERROR_PARSE_HTTP_RESPONSE)
        End Try
                //......省略部分代码

调用部分在这里

 HttpPostErrorWithExceptionEx(Of String)("/Login/LoginSucess", requestdata, "")

 被反序列化的部分res.ResultStr:{"istr_UserId":"TASUser","istr_System":"TAS-BO","istr_DBName":"AccessControl_TAS","istr_Station":"iphone8","istr_IPAddr":"10.0.2.15"}

报错信息:

你的json文件有非法字符，贴出完整的json，看是否完整。